Chapter 2 Themes and Colors Key LitCharts assigns a color and icon to each theme in Your Inner Fish, which you can use to track the themes throughout the work. Neil Shubin describes how he taught a human anatomy course at the University of Chicago, though his degree was in paleontology and his specialty was fish. The second year he taught the course, Shubin found a fossil fish from the period of transition between water animals and land animals, and this discovery reframed how he thought about the human body. From the start, Shubin highlights how knowledge of animals can help anyone who wants to study the human body, as humans are so similar to other animals underneath the surface.
Vision[ edit ] Fish have a refractive index gradient within the lens of their eyes which compensates for spherical aberration. Vision in fishes Vision is an important sensory system for most species of fish.
Fish eyes are similar to those of terrestrial vertebrates like birds and mammals, but have a more spherical lens.
YOUR INNER FISH: A Journey Into the Billion-Year History of the Human Body.(). Neil Shubin. The author is a professor of anatomy at the University of Chicago, and is the current Provost of the Field Museum.4/5. Product Description. Your Inner Fish reveals a startling truth: Hidden within the human body is a story of life on Earth. This scientific adventure story takes viewers from Ethiopia to the Arctic Circle on a hunt for the many ways that our animal ancestors shaped our anatomical destiny. "Starred Review. A skillful writer, paleontologist Shubin conveys infectious enthusiasm Even readers with only a layperson's knowledge of evolution will learn marvelous things about the unity of all organisms since the beginning of life." - Kirkus Reviews. "I was hooked from the first chapter of Your Inner Fish. Creationists will want this book .
Their retinas generally have both rod cells and cone cells for scotopic and photopic visionand most species have colour vision. Some fish can see ultraviolet and some can see polarized light. Amongst jawless fishthe lamprey has well-developed eyes, while the hagfish has only primitive eyespots.
Fish and other aquatic animals live in a different light environment than terrestrial species. Water absorbs light so that with increasing depth the amount of light available decreases quickly.
The optic properties of water also lead to different wavelengths of light being absorbed to different degrees, for example light of long wavelengths e.
Hearing[ Review on the inner fish ] Hearing is an important sensory system for most species of fish. Hearing threshold and the ability to localize sound sources are reduced underwater, in which the speed of sound is faster than in air.
Underwater hearing is by bone conductionand localization of sound appears to depend on differences in amplitude detected by bone conduction. Some fishes, such as some species of carp and herringhear through their swim bladders, which function rather like a hearing aid.
Although it is hard to test sharks' hearing, they may have a sharp sense of hearing and can possibly hear prey many miles away.
The lateral line shows a similar arrangement, and is open to the environment via a series of openings called lateral line pores. This is a reminder of the common origin of these two vibration- and sound-detecting organs that are grouped together as the acoustico-lateralis system.
In bony fish and tetrapods the external opening into the inner ear has been lost.
A three-spined stickleback with stained neuromasts Hair cells in fish are used to detect water movements around their bodies.
These hair cells are embedded in a jelly-like protrusion called cupula. The hair cells therefore can not be seen and do not appear on the surface of skin.
The lateral line in fish and aquatic forms of amphibians is a detection system of water currents, consisting mostly of vortices. The lateral line is also sensitive to low-frequency vibrations.
The mechanoreceptors are hair cells, the same mechanoreceptors for vestibular sense and hearing. It is used primarily for navigation, hunting, and schooling.
The receptors of the electrical sense are modified hair cells of the lateral line system. Fish and some aquatic amphibians detect hydrodynamic stimuli via a lateral line. This system consists of an array of sensors called neuromasts along the length of the fish's body.
The sensory cells within neuromasts are polarized hair cells contained within a gelatinous cupula.
Afferent nerve fibers are excited or inhibited depending on whether the hair cells they arise from are deflected in the preferred or opposite direction. Lateral line receptors form somatotopic maps within the brain informing the fish of amplitude and direction of flow at different points along the body.
These maps are located in the medial octavolateral nucleus MON of the medulla and in higher areas such as the torus semicircularis. It can be used to regulate the buoyancy of the fish. Fish like the weather fish and other loaches are also known to respond to low pressure areas but they lack a swim bladder.
Chemoreception[ edit ] The shape of the hammerhead shark 's head may enhance olfaction by spacing the nostrils further apart.
Papilla fish anatomy The aquatic equivalent to smelling in air is tasting in water. Many larger catfish have chemoreceptors across their entire bodies, which means they "taste" anything they touch and "smell" any chemicals in the water.
Speculation about whether odours provide homing cues, go back to the 19th century.Aquarium Gift Guide. Share the wonders of the aquatic world when you give National Aquarium tickets or memberships, or make a donation in honor of a loved one! Is the fish really our ancestor?
A review of Your Inner Fish: A Journey into the Billion-Year History of the Human Body by Neil Shubin Pantheon Books, New York, reviewed by Colin Mitchell. The author, Neil Shubin, is Professor of Anatomy at the University of Chicago and Provost of its field museum.
Tweet Share 0 LinkedIn 0 Getting to the Heart of David Letterman The beloved king of comedy—and part time Montana resident—talks about growing up and getting older. By Brian Schott Published December 16, by Whitefish Review As of his final Late Show this past May, David Letterman had hosted 19, guest appearances on 6, broadcasts across .
Your Inner Fish is a 3-part science series that takes a fresh look at human evolution. Join Neil Shubin for a quirky examination of fossils and DNA. change to 'from shares inner join dealing_Record on' you have joined shares with shares – wxyz Nov 8 '13 at Your Inner Fish Summary Next.
Chapter 1. Neil Shubin, the author and narrator, opens the book with a story about his experience teaching a human anatomy course at the University of Chicago, even though his degree and research has been primarily in paleontology. The summer after he taught this course, he discovered a fossil fish from .